Update releaseNote.md

Fix for agent hang when process cannot be killed (microsoft#4074)

* fix

* added knob

* added tests, fixes

* CA1063

* move knob check out of loop

* Remove experiment code

* Use RuntimeKnobSource, disable by default

* Remove unused field

Update agentversion

Update dotnet scripts (microsoft#4046)

Revert "Implement AGENT_MIN_SECRET_LENGTH knob (microsoft#3962)" (mic…

…rosoft#4040)

This reverts commit aa4cce9.

fix pipeline / update agent version

fix issue when repo/path contains spaces (microsoft#3985)

Implement getting knob value by source type (microsoft#3955)

* Add getting specific knob value by source type

* Add unit tests

* Fix interfaces

* Update behavior for not matching to null

* Update tests

* Restrict to get knob by interface

Update Agent.Worker GitSourceProvider to not pass auth header in argu…

…ments (microsoft#3958)

Update GitSourceProvider to not pass auth header in arguments (micros…

…oft#3949)